00848nam0-22003011i-450-99000184667040332120021010000184667FED01000184667(Aleph)000184667FED0100018466720021010d--------km-y0itay50------baita<<The >>economic importance of the diatomsAlbert Mann.WashingtonGovernment Printing Office1917.p. 377-3866 tav.27 cmEstr. da: Smithsonian report, 1916Diatomee589.481Mann,Albert81167ITUNINARICAUNIMARCBK99000184667040332160 MISC. B 59/20FAGBCFAGBCEconomic importance of the diatoms415142UNINAING01